<!--
/**
 * author: vformAdmin
 * email: vdpadmin@163.com
 * website: https://www.vform666.com
 * date: 2021.08.18
 * remark: 如果要分发VForm源码，需在本文件顶部保留此文件头信息！！
 */
-->

<template>
  <div class="field-wrapper" :class="{'design-time-bottom-margin': !!this.designer}">
    <el-form-item v-if="!!field.formItemFlag && (!field.options.hidden || (designState === true))"
                  :label="label" :label-width="labelWidth + 'px'"
                  :title="field.options.labelTooltip"
                  :rules="rules" :prop="getPropName()"
                  :class="[selected ? 'selected' : '', labelAlign, customClass, field.options.required ? 'required' : '']"
                  @click.native.stop="selectField(field)">

      <span v-if="!!field.options.labelIconClass" slot="label" class="custom-label">
        <template v-if="field.options.labelIconPosition === 'front'">
          <template v-if="!!field.options.labelTooltip">
            <el-tooltip :content="field.options.labelTooltip" effect="light">
              <i :class="field.options.labelIconClass"></i></el-tooltip>{{label}}</template>
          <template v-else>
            <i :class="field.options.labelIconClass"></i>{{label}}</template>
        </template>
        <template v-else-if="field.options.labelIconPosition === 'rear'">
          <template v-if="!!field.options.labelTooltip">
            {{label}}<el-tooltip :content="field.options.labelTooltip" effect="light">
            <i :class="field.options.labelIconClass"></i></el-tooltip></template>
          <template v-else>
            {{label}}<i :class="field.options.labelIconClass"></i></template>
        </template>
      </span>
      <slot></slot>
    </el-form-item>

    <template v-if="!!this.designer">
      <div class="field-action" v-if="designer.selectedId === field.id">
        <i class="el-icon-back" :title="i18nt('designer.hint.selectParentWidget')" @click.stop="selectParentWidget(field)"></i>
        <i class="el-icon-top" v-if="!!parentList && (parentList.length > 1)" :title="i18nt('designer.hint.moveUpWidget')"
           @click.stop="moveUpWidget(field)"></i>
        <i class="el-icon-bottom" v-if="!!parentList && (parentList.length > 1)" :title="i18nt('designer.hint.moveDownWidget')"
           @click.stop="moveDownWidget(field)"></i>
        <i class="el-icon-delete" :title="i18nt('designer.hint.remove')" @click.stop="removeFieldWidget"></i>
      </div>

      <div class="drag-handler background-opacity" v-if="designer.selectedId === field.id">
        <i class="el-icon-rank" :title="i18nt('designer.hint.dragHandler')"></i>
        <i>{{i18n2t(`designer.widgetLabel.${field.type}`, `extension.widgetLabel.${field.type}`)}}</i>
        <i v-if="field.options.hidden === true" class="iconfont icon-hide"></i>
      </div>
    </template>
  </div>
</template>

<script>
  import i18n from "@/utils/i18n";

  export default {
    name: "form-item-wrapper",
    mixins: [i18n],
    props: {
      field: Object,
      designer: Object,
      parentWidget: Object,
      parentList: Array,
      indexOfParentList: Number,

      designState: {
        type: Boolean,
        default: false
      },

      subFormRowIndex: { /* 子表单组件行索引，从0开始计数 */
        type: Number,
        default: -1
      },
      subFormColIndex: { /* 子表单组件列索引，从0开始计数 */
        type: Number,
        default: -1
      },
      subFormRowId: { /* 子表单组件行Id，唯一id且不可变 */
        type: String,
        default: ''
      },

      rules: Array,
    },
    inject: ['formConfig'],
    computed: {
      selected() {
        return !!this.designer && this.field.id === this.designer.selectedId
      },

      label() {
        if (!!this.field.options.labelHidden) {
          return ''
        }

        return this.field.options.label
      },

      labelWidth() {
        if (!!this.field.options.labelHidden) {
          return !!this.designState ? 5 : 0  //设计期间标签最小宽度5像素，以便于鼠标点击可选中组件！！
        }

        if (!!this.field.options.labelWidth) {
          return this.field.options.labelWidth
        }

        if (!!this.designer) {
          return this.designer.formConfig.labelWidth
        } else {
          return this.formConfig.labelWidth
        }
      },

      labelAlign() {
        if (!!this.field.options.labelAlign) {
          return this.field.options.labelAlign
        }

        if (!!this.designer) {
          return this.designer.formConfig.labelAlign || 'label-left-align'
        } else {
          return this.formConfig.labelAlign || 'label-left-align'
        }
      },

      customClass() {
        return !!this.field.options.customClass ? this.field.options.customClass.join(' ') : ''
      },

      subFormName() {
        return !!this.parentWidget ? this.parentWidget.options.name : ''
      },

      subFormItemFlag() {
        return !!this.parentWidget ? this.parentWidget.type === 'sub-form' : false
      },

    },
    created() {
      //
    },
    methods: {

      selectField(field) {
        if (!!this.designer) {
          this.designer.setSelected(field)
          this.designer.emitEvent('field-selected', this.parentWidget)  //发送选中组件的父组件对象
        }
      },

      selectParentWidget() {
        if (this.parentWidget) {
          this.designer.setSelected(this.parentWidget)
        } else {
          this.designer.clearSelected()
        }
      },

      moveUpWidget() {
        this.designer.moveUpWidget(this.parentList, this.indexOfParentList)
        this.designer.emitHistoryChange()
      },

      moveDownWidget() {
        this.designer.moveDownWidget(this.parentList, this.indexOfParentList)
        this.designer.emitHistoryChange()
      },

      removeFieldWidget() {
        if (!!this.parentList) {
          let nextSelected = null
          if (this.parentList.length === 1) {
            if (!!this.parentWidget) {
              nextSelected = this.parentWidget
            }
          } else if (this.parentList.length === (1 + this.indexOfParentList)) {
            nextSelected = this.parentList[this.indexOfParentList - 1]
          } else {
            nextSelected = this.parentList[this.indexOfParentList + 1]
          }

          this.$nextTick(() => {
            this.parentList.splice(this.indexOfParentList, 1)
            //if (!!nextSelected) {
            this.designer.setSelected(nextSelected)
            //}

            this.designer.emitHistoryChange()
          })
        }
      },

      getPropName() {
        if (this.subFormItemFlag && !this.designState) {
          return this.subFormName + "." + this.subFormRowIndex + "." + this.field.options.name + ""
        } else {
          return this.field.options.name
        }
      },


    }
  }
</script>

<style lang="scss" scoped>
  @import "../../../../styles/global.scss";

  .design-time-bottom-margin {
    margin-bottom: 5px;
  }

  .field-wrapper {
    position: relative;

    .field-action{
      position: absolute;
      //bottom: -24px;
      bottom: 0;
      right: -2px;
      height: 22px;
      line-height: 22px;
      background: $--color-primary;
      z-index: 9;

      i {
        font-size: 14px;
        color: #fff;
        margin: 0 5px;
        cursor: pointer;
      }
    }

    .drag-handler {
      position: absolute;
      top: 0;
      //bottom: -22px;  /* 拖拽手柄位于组件下方，有时无法正常拖动，原因未明？？ */
      left: -1px;
      height: 20px;
      line-height: 20px;
      //background: $--color-primary;
      z-index: 9;

      i {
        font-size: 12px;
        font-style: normal;
        color: #fff;
        margin: 4px;
        cursor: move;
      }

      &:hover {
        //opacity: 1;
        background: $--color-primary;
      }
    }
  }

  .el-form-item {
    //margin-bottom: 0 !important;
    //margin-bottom: 6px;

    //margin-top: 2px;
    position: relative;

    ::v-deep .el-form-item__label {
      white-space: nowrap;
      text-overflow: ellipsis;
    }

    ::v-deep .el-form-item__content {
      //position: unset;  /* TODO: 忘了这个样式设置是为了解决什么问题？？ */
    }

    span.custom-label i {
      margin: 0 3px;
    }

    /* 隐藏Chrome浏览器中el-input数字输入框右侧的上下调整小箭头 */
    ::v-deep .hide-spin-button input::-webkit-outer-spin-button,
    ::v-deep .hide-spin-button input::-webkit-inner-spin-button {
      -webkit-appearance: none !important;
    }

    /* 隐藏Firefox浏览器中el-input数字输入框右侧的上下调整小箭头 */
    ::v-deep .hide-spin-button input[type="number"] {
      -moz-appearance: textfield;
    }
  }

  .required ::v-deep .el-form-item__label::before {
    content: '*';
    color: #F56C6C;
    margin-right: 4px;
  }

  .static-content-item {
    min-height: 20px;
    display: flex;  /* 垂直居中 */
    align-items: center;  /* 垂直居中 */

    ::v-deep .el-divider--horizontal {
      margin: 0;
    }
  }

  .el-form-item.selected, .static-content-item.selected {
    outline: 2px solid $--color-primary;
  }

  ::v-deep .label-left-align .el-form-item__label {
    text-align: left;
  }

  ::v-deep .label-center-align .el-form-item__label {
    text-align: center;
  }

  ::v-deep .label-right-align .el-form-item__label {
    text-align: right;
  }


</style>
